Concrete-culvert mold.



H. F. WORLEY.

CONCRETE CULVERT MOLD.

APPLICATION FILED IuLY 24.1916.

3,243,910. Patented OCI. 23,1917.

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HENRY F. WORLEY, -OE MINNEAPOLIS, MINNESOTA, ASSIGNOR TO JOSEPH S.MCCABE, OF MINNEAPOLIS, MINNESOTA.

CONCBETE-CULVERT MOLD.

VTo all whom z'zf may concern:

Be it known that `il, HENRY F. WORLEY, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inConcrete-.Culvert Molds, of which the following is a specification.

My invention relates to concrete culvert molds and has for its objecttol provide a collapsible inner mold or form which may be quicklyassembled or taken down, and which when up will support the weight ofthe concrete in an eicient and stable manner. In carrying out thisobject I employ a pairof longitudinal base members upon which aredetachably secured a pair of segmental arch-like supports, whichsupports carry a number of longitudinal cover sheets forming theexterior surface over which the concrete is poured.

The full objects and advantages of my invention will appear inconnection with the detailed description thereof and are particularly.pointed out in theclaims.

In the drawings, illustrating tion ofmy inventionin one form,-

Figure 1 is an elevational view of my invention with parts cut away toshow the construction of the same. Fig. 2 is a transverse sectional viewof a culvert with my apparatus in place. Figs. 3 and 4 are enlargedelevational detail views'of the device for locking the supportingmembers in place showing the parts in relatively altered positions. Fig.5 ils an end view of the device shown in Figs. 4 and 5.

My invention comprises primarily a semicylindrical interior mold or formover which concrete may be 'poured to form an arched channel and is bestillustrated in Figs. 1 and 2. A pairof longitudinal, base members 10 and11, preferably formed of angle iron, are provided near the ends withcast.

ings 12 and 13 which are rigidly riveted to both lian esl thereof. Uponthese castings are detacably mounted in a manner to be presentlydescribed a pair of arched sup*- porting members 14 and 15 formed bybendlng an angle iron in an arc of a clrcle with one of the flanges 16in the plane of the circle and the other flange 17 positioned atSpecication of'Letters Patent.

the applica- Patented oet. 23, 1917.

Application illed July 24, 1916. Serial No. 110,822.

the inner periphery of the same. Each of vided at regular intervalsalong the outer periphery thereof with a number of angular notches 18,by means of which the cover sheets 19 or members forming the moldingsurface of the device are held in place. Members 19 are formed of sheetmetal cut in long stripsof a length equal to the length of the basemembers 10 and 11, with one of their edges 20 bent at an angle to thebody of the same to form a sort of hook extending throughout the lengthof each strip. These strips areA further'made slightly concave alongtheir extended surface by slightly bending the body of the strip at thecenter, parallel to an edge thereof, as clearly indicated at 21 in Fig.2. This concave surface of the strip in conjunction with theturnedoveredge 20 has the effect of greatly stil'ening the strips toeffectively support the mass of concrete which is placed upon thesecover sheets or' strips. The manner of applying the strips 19 to thesupports is almost selfevident from the drawings. h The strips arehooked into the notches 18 in said supports by means of the turned-overedges 20, the strips being lirst placed on the lowest notches and thenon succeeding ynotches until ,all but a central space at the top hasbeen covered, each strip overlapping the previouslyositioned strip. Thislast space is closed y a concave strip 22 formed Without ya hooked edge,whichstrip has attached to its under side a pair of blocks 23 which fitinto rectangular notches 24 inthe flanges 16 of the arched supports 14and 15. Blocks 23 are themselves provided with similar notches 25, bymeans of which the supports and said upper strip are held from movementin a longitudinal direction. These blocks are preferably of a widthequal to the Aspace between the turned-over edges 20 of the last twostrips, so that the last strips are securely With a `vertical Wall 26positioned a short distance from the edge of the angle base members 10,from which Wall issues a Weblike structure 27 terminating in adownwardly-projecting hook 28 situated in a longitudinal plane. SllPpOrt14 is provided with a rectangular aperture 29 through which the hook 28is adapted to pass When the support 14 is placed in position as shown inFig. 3. A dog 30 is provided with a notch 31 adapted' to engage theunder side of the flange 16 at 32v to raise said flange against the hook28 and firmly hold the same in place. rlh-is dog is mounted on a pin 34which passes through a vertical slotted hole 35 therein, which pin issecured to a. depending portion 36 of the hook 28 and to the Wall 26.Each of the dogs 30 on each of the base' members 10 and ll is provid-edat its lower extremity with a bifurcated portion 37 by means off whichit is pivoted to a longitu'dinallysextending bar 38. lVhen the bar isdrawn forward dog 30 is caused to take the position shown ina Fig. 3.with the portion 37 substantially under the end of the flange 16.rl`h-us the Whole weight of the form and the concrete poured thereon isheld directly by the base member l0 through the dog 30 Without anyintermediate pivot-al support.- When bar 38 iis shifted backward dog 30slides on pin 34 and is shifted to the position shown in Fig. 4, whereby,the flange 16 is disengaged from the hook 28. To facilitate the down'-Ward motion of said flange the upper portions 39 and 40V of hook 30 andWall 26 are made inclined so that the support slides smoothly ou-t ofits previous position'.A lt will here be noted that the movement of dog80 is such that the flange' 16 is actually discharged from engagementwith hook 28. ln this manner a positive action is secured which causesthe mol-d or form to completely collapse when said bar 38 is actuated.

lln Fig. 1 is shown a device for actuating the bar 38. An H -shapedcasting 41 is riveted to angle iron l() near the front end and is boredto receive a spindle 42 constrained to purely rotational movementtherein by a collar 44, hand wheel 43 and with which said spindle .maybe rotated. Spindle 42 is threaded at its freepend and is adapted toscrew into a threaded block 45 to which the end of bar 38 is firmlysecured. In this mann-er the supports are simultaneously disengaged tocause the whole mold to collapse at one time, or are simultaneouslyclamped in place.

The' manner of operation and use is very simple.- A; ditch 46 is dug ofa Width equal to the exterior width `of the culvert. d dat or concavebottom 47 is then cast and allowed to set and the mold erected andpositioned upon this bottom. Concrete is now poured or placed about themold at 48 asclearly shown in Fig;l 2 and allowed to set, after whichvthe mold is removed and again erected. Two such molds, as described',may be conveniently used together if desired, thus increasing the lengthof culvert east at one time.

By employing arched supporting members of different radii having thenotches in the peripheries of the did'ereni? `Illlllbers equispaced,dilferent sizes of Culver-ts may be' easily and quickly formed With oneoutlit employing the same base members and the desired number of coversheets-.or strips; ln certain cases When la culvert yof large dimensionsis being formed it is found that the form-sup orting members 14 and l5are not held su 'ciently rigid in place by the hook member 28 and thedog 30. ln. such cases E employ an additional set of braces- 50 whichhave shouldered ends adapted'to be placed into correspondingdepressionsin the base members 10 and 11- and in ythe ilanges 17 of the4supporting members 14 and 15. Any longitudinal stresses imparted to:either of the members 14 and l5, which are usually in "a directiontoward the front ofthe (mold, are hence counter-acted 'by these braces50 and by the blocks 23 on the upper cover strip 22.-

l claim:

la. A molding device comprising a base member, a form-supporting memberhaving an aperture in one end thereof, a casting secured to said base, adownwardly-projecting hook issuing therefrom and adapted to cop'eratewith said a erture,` means mounted on said casting acting upon saidsupporting member for holding the same locked in position under saidhook, and a form bpositioned on saidv form-.supporting mein- 2.- Amolding device comprising a base member, a formeupp'orting member havingan aperture in one end thereof, a casting secured to said base, adownwardly-projecting hook issuing therefrom and adapted to coperatewith said aperture, a dog mounted on said castingl acting upon saidsupporting member and said base for holding the supporting member lockedin position under.` said hook and for directly transmit.v ting theWeight upon the supporting member to the base, and a form positionedupon said supporting member.

3. A molding device comprising a base, a clamping device secured to saidbase, a form-supporting member adapted to be held in place by saidclamping device, said device4 including means for releasing said supportand for positively ejecting said support from said clamping device, anda form positioned on said form-supporting member.

4. di molding device comprising a longitudinal base, a pair of clampingdevices secured one at each end to said base, a pair of form-supportingmembers adapted to be lielfl in place by said clamping devices, Saiddevices including means for releasing said supports and for `positivelyejecting said su pports from said clamping device, means forsimultaneously actuating said releasing and ejectng means,l and a formpositioned on said supports.

vIn testimony whereof I affix my signature in presence of two Witnesses.HENRY F.. WORLEY.

lVitnesses: Y

ALEX. LAGAARD, H. A. BOWMAN.

